apps/crl2p7.c

   1 /*
   2  * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <string.h>
  12 #include <sys/types.h>
  13 #include "apps.h"
  14 #include <openssl/err.h>
  15 #include <openssl/evp.h>
  16 #include <openssl/x509.h>
  17 #include <openssl/pkcs7.h>
  18 #include <openssl/pem.h>
  19 #include <openssl/objects.h>
  20
  21 static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile);
  22
  23 typedef enum OPTION_choice {
  24     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  25     OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_NOCRL, OPT_CERTFILE
  26 } OPTION_CHOICE;
  27
  28 const OPTIONS crl2pkcs7_options[] = {
  29     {"help", OPT_HELP, '-', "Display this summary"},
  30     {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
  31     {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
  32     {"in", OPT_IN, '<', "Input file"},
  33     {"out", OPT_OUT, '>', "Output file"},
  34     {"nocrl", OPT_NOCRL, '-', "No crl to load, just certs from '-certfile'"},
  35     {"certfile", OPT_CERTFILE, '<',
  36      "File of chain of certs to a trusted CA; can be repeated"},
  37     {NULL}
  38 };
  39
  40 int crl2pkcs7_main(int argc, char **argv)
  41 {
  42     BIO *in = NULL, *out = NULL;
  43     PKCS7 *p7 = NULL;
  44     PKCS7_SIGNED *p7s = NULL;
  45     STACK_OF(OPENSSL_STRING) *certflst = NULL;
  46     STACK_OF(X509) *cert_stack = NULL;
  47     STACK_OF(X509_CRL) *crl_stack = NULL;
  48     X509_CRL *crl = NULL;
  49     char *infile = NULL, *outfile = NULL, *prog, *certfile;
  50     int i = 0, informat = FORMAT_PEM, outformat = FORMAT_PEM, ret = 1, nocrl =
  51         0;
  52     OPTION_CHOICE o;
  53
  54     prog = opt_init(argc, argv, crl2pkcs7_options);
  55     while ((o = opt_next()) != OPT_EOF) {
  56         switch (o) {
  57         case OPT_EOF:
  58         case OPT_ERR:
  59  opthelp:
  60             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
  61             goto end;
  62         case OPT_HELP:
  63             opt_help(crl2pkcs7_options);
  64             ret = 0;
  65             goto end;
  66         case OPT_INFORM:
  67             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
  68                 goto opthelp;
  69             break;
  70         case OPT_OUTFORM:
  71             if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
  72                 goto opthelp;
  73             break;
  74         case OPT_IN:
  75             infile = opt_arg();
  76             break;
  77         case OPT_OUT:
  78             outfile = opt_arg();
  79             break;
  80         case OPT_NOCRL:
  81             nocrl = 1;
  82             break;
  83         case OPT_CERTFILE:
  84             if ((certflst == NULL)
  85                 && (certflst = sk_OPENSSL_STRING_new_null()) == NULL)
  86                 goto end;
  87             if (!sk_OPENSSL_STRING_push(certflst, opt_arg()))
  88                 goto end;
  89             break;
  90         }
  91     }
  92     argc = opt_num_rest();
  93     if (argc != 0)
  94         goto opthelp;
  95
  96     if (!nocrl) {
  97         in = bio_open_default(infile, 'r', informat);
  98         if (in == NULL)
  99             goto end;
 100
 101         if (informat == FORMAT_ASN1)
 102             crl = d2i_X509_CRL_bio(in, NULL);
 103         else if (informat == FORMAT_PEM)
 104             crl = PEM_read_bio_X509_CRL(in, NULL, NULL, NULL);
 105         if (crl == NULL) {
 106             BIO_printf(bio_err, "unable to load CRL\n");
 107             ERR_print_errors(bio_err);
 108             goto end;
 109         }
 110     }
 111
 112     if ((p7 = PKCS7_new()) == NULL)
 113         goto end;
 114     if ((p7s = PKCS7_SIGNED_new()) == NULL)
 115         goto end;
 116     p7->type = OBJ_nid2obj(NID_pkcs7_signed);
 117     p7->d.sign = p7s;
 118     p7s->contents->type = OBJ_nid2obj(NID_pkcs7_data);
 119
 120     if (!ASN1_INTEGER_set(p7s->version, 1))
 121         goto end;
 122     if ((crl_stack = sk_X509_CRL_new_null()) == NULL)
 123         goto end;
 124     p7s->crl = crl_stack;
 125     if (crl != NULL) {
 126         sk_X509_CRL_push(crl_stack, crl);
 127         crl = NULL;             /* now part of p7 for OPENSSL_freeing */
 128     }
 129
 130     if ((cert_stack = sk_X509_new_null()) == NULL)
 131         goto end;
 132     p7s->cert = cert_stack;
 133
 134     if (certflst != NULL)
 135         for (i = 0; i < sk_OPENSSL_STRING_num(certflst); i++) {
 136             certfile = sk_OPENSSL_STRING_value(certflst, i);
 137             if (add_certs_from_file(cert_stack, certfile) < 0) {
 138                 BIO_printf(bio_err, "error loading certificates\n");
 139                 ERR_print_errors(bio_err);
 140                 goto end;
 141             }
 142         }
 143
 144     out = bio_open_default(outfile, 'w', outformat);
 145     if (out == NULL)
 146         goto end;
 147
 148     if (outformat == FORMAT_ASN1)
 149         i = i2d_PKCS7_bio(out, p7);
 150     else if (outformat == FORMAT_PEM)
 151         i = PEM_write_bio_PKCS7(out, p7);
 152     if (!i) {
 153         BIO_printf(bio_err, "unable to write pkcs7 object\n");
 154         ERR_print_errors(bio_err);
 155         goto end;
 156     }
 157     ret = 0;
 158  end:
 159     sk_OPENSSL_STRING_free(certflst);
 160     BIO_free(in);
 161     BIO_free_all(out);
 162     PKCS7_free(p7);
 163     X509_CRL_free(crl);
 164
 165     return (ret);
 166 }
 167
 168 /*-
 169  *----------------------------------------------------------------------
 170  * int add_certs_from_file
 171  *
 172  *      Read a list of certificates to be checked from a file.
 173  *
 174  * Results:
 175  *      number of certs added if successful, -1 if not.
 176  *----------------------------------------------------------------------
 177  */
 178 static int add_certs_from_file(STACK_OF(X509) *stack, char *certfile)
 179 {
 180     BIO *in = NULL;
 181     int count = 0;
 182     int ret = -1;
 183     STACK_OF(X509_INFO) *sk = NULL;
 184     X509_INFO *xi;
 185
 186     in = BIO_new_file(certfile, "r");
 187     if (in == NULL) {
 188         BIO_printf(bio_err, "error opening the file, %s\n", certfile);
 189         goto end;
 190     }
 191
 192     /* This loads from a file, a stack of x509/crl/pkey sets */
 193     sk = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL);
 194     if (sk == NULL) {
 195         BIO_printf(bio_err, "error reading the file, %s\n", certfile);
 196         goto end;
 197     }
 198
 199     /* scan over it and pull out the CRL's */
 200     while (sk_X509_INFO_num(sk)) {
 201         xi = sk_X509_INFO_shift(sk);
 202         if (xi->x509 != NULL) {
 203             sk_X509_push(stack, xi->x509);
 204             xi->x509 = NULL;
 205             count++;
 206         }
 207         X509_INFO_free(xi);
 208     }
 209
 210     ret = count;
 211  end:
 212     /* never need to OPENSSL_free x */
 213     BIO_free(in);
 214     sk_X509_INFO_free(sk);
 215     return (ret);
 216 }